- 4″ B Prospector Hammer System on a Vermeer D36x50
- 300 psi x 975 cfm air compressor
- Ground Conditions: Hard compacted and laminated sandstone
- Pilot hole for power conduit
Outcome: This bore was 600-ft (200 m) in length with a 150-ft increase in elevation from drill to exit pit. We entered at -15% and exited at +56%. Bore was complete in 2 days.